Sanghyun Chi,

Experience

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  Samsung Advanced Institute of Technology

  Sept 2002 - Jul 2003

  Researcher/Developer

  Developed and patented a scalable codec apparatus for IP network broadcasting using CDesigned, researched, and implemented a 4kbps codec designed for VoIP services using C Developed a wideband speech codec that covered up to 7 kHz audio band using CTranslated a floating-to-fixed conversion of solution, and implemented it on ARM-9 Participated in the standardization of narrow-band/wideband VoIP speech codecs

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  SozoTek Inc

  Jan 2005 - May 2005

  Software Engineer Intern

  Classified phone-camera images to apply different compression algorithmsDeveloped an objective image quality metrics

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  Qualcomm

  May 2005 - Aug 2005

  R&D Cooperate Intern

  • Researched on resource efficiency in design speech codec packet. • Performed subjective and objective speech quality test experiments. • Researched post-processing for a wideband speech codec

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  VIA Telecom

  May 2010 - Feb 2013

  Audio System/Software Engineer, Sr. Engineer

  Develop audio/speech signal pre-/post-processing: acoustic shock protection, acoustic echo cancellation, blind source separation, automatic gain control, noise cancellation, double talk detection, artificial bandwidth extension, etc.Develop and maintain audio/speech standards: EVRC, EVRC-B, AMR, EVRC-NW, QCELP, AMR-WB, AAC, etc.Lead a DSP implementation teamFamiliar with a mobile phone test equipment (Bruel and Klaijer) Validate I2S/PCM interfaces.Real-time OS for DSP.

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  Qualcomm

  Mar 2013 - Jan 2024

  Audio System/Multimedia R&D - Audio, Senior Staff

  Audio/Speech Signal processing:- Evaluate end-to-end audio quality in recording/playing-back path - 3D Audio Rendering for Virtual Reality/ Augmented Reality- Multi-mic processing: Spatial Recording, 3D Audio Capture, Audio Zoom- Adaptive Active Noise Cancellation (AANC)- Audio Pre-/Post-Processing: MBDRC, Limiter, PBE, PEQ, AGC, Source Rate Converter - Recording Path: High Dynamic Range (HDR) recording, Wind Noise Reduction (WNR), Ambient Noise Suppression (ANS)- Play-back Path: Blind Bandwidth Extension, Time Scale Modification (TSM) Show less

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  Bose Corporation

  Feb 2024 - Apr 2024

  Sr. Embedded SW Engineer
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  Qualcomm

  Apr 2024 - now

  Multimedia R&D - Audio, Sr. Staff